package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求头里面的token值
        String token = request.getHeader("Authorization");
        if (StrUtil.isBlank(token)) {
           return true;
        }

        //2.基于token获取redis中的用户
        String key = RedisConstants.LOGIN_USER_KEY+token;
        Map<Object, Object> usermap = stringRedisTemplate.opsForHash().entries(key);

        //3.判断用户是否存在
        if (usermap.isEmpty()) {
           return true;
        }
        //5.将查询到的数据，转化为UserDTO数据
        UserDTO userDTO = BeanUtil.fillBeanWithMap(usermap, new UserDTO(), false);

        //6.存在，将数据保存到ThreadLocal
        UserHolder.saveUser(userDTO);

        //7.刷新redis的用户存活时间
        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);

        return true;    }
}
